Subtracting from 25004 its product of nonzero digits (40), we obtain a square (24964 = 1582).
Adding to 25004 its reverse (40052), we get a palindrome (65056).
25004 is nontrivially palindromic in base 11.
It is a plaindrome in base 12.
It is a congruent number.
It is an unprimeable number.
25004 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
225004 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 25004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26880).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
25004 is a wasteful number, since it uses less digits than its factorization.
25004 is an odious number, because the sum of its binary digits is odd.
The square root of 25004 is about 158.1265316131. The cubic root of 25004 is about 29.2417367751.
The spelling of 25004 in words is "twenty-five thousand, four".